Finding the Third Proportional to 3,899,473 and 8,415,493

Step by Step Solution

1. Step 1: Write the proportion equation
   3,899,473 : 8,415,493 = 8,415,493 : x
2. Step 2: Convert to fraction form
   3,899,473/8,415,493 = 8,415,493/x
3. Step 3: Cross multiply
   3,899,473x = 8,415,493 × 8,415,493
4. Step 4: Simplify right side
   3,899,473x = 70,820,522,433,049
5. Step 5: Solve for x
   x = 70,820,522,433,049/3,899,473
6. Step 6: Final answer
   x = 18,161,562.46